10 gauge

Photo coming soon: side view on a transparent background, with author and license.

Key specs

Type: Shotgun
Gauge: 10 gauge
Bullet diameter: 19.68 mm

Weapons chambered for it 2

ShotgunsRemington SP-1010 gaugeUnited States · 1989

Lever-action riflesWinchester Model 190110 gaugeUnited States · 1901

Sources

Wikipedia: Gauge (firearms), Wikipedia